Delegates from many of south Asian nations affected by December's deadly tsunami are in Tokyo to study Japan's advanced tsunami warning system.
A three-day conference sponsored by the United Nations opened Tuesday as part of an effort to establish an early tsunami warning system for the Indian Ocean by mid-2006.
The representatives from Indonesia, Sri Lanka, Thailand and other nations in the region also will visit Japanese coastal communities to see how they respond to earthquake and tsunami warnings.
Japan, which is prone to earthquakes and tsunamis, has offered to share its tsunami-warning technology to build the new Indian Ocean system.
Some information for this report provided by AFP and AP.